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dnartS
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We have a tricky question for homework that is starting our new unit of phase changes, after we have been doing calorimetry
120.0g of an unknown solid at 235*c is added to a 1.5kg piece of ice at -20*c inside a styrofoam container. After a period of time, both substances areat 120*c. What is the specific heat of the unknown material in kJ/g.*c and kcal/g.*c?
Here's what I was thinking yesterday:
Qsurround = Mh20Ch20ΔT ([120]-[20])
...
but I'm confused and that wouldn't account for the phase change in the question.
My teacher gave us this hint today:
"Qsurroundings = Q1 + Q2 + Q3 + Q4 + Q5"
Any help would be great thanks :)
120.0g of an unknown solid at 235*c is added to a 1.5kg piece of ice at -20*c inside a styrofoam container. After a period of time, both substances areat 120*c. What is the specific heat of the unknown material in kJ/g.*c and kcal/g.*c?
Here's what I was thinking yesterday:
Qsurround = Mh20Ch20ΔT ([120]-[20])
...
but I'm confused and that wouldn't account for the phase change in the question.
My teacher gave us this hint today:
"Qsurroundings = Q1 + Q2 + Q3 + Q4 + Q5"
Any help would be great thanks :)